Figure 12From: A Contourlet-Based Image Watermarking Scheme with High Resistance to Removal and Geometrical Attacks Recovered watermarks from Lena image under various filtering and enhancement attacks (a) FMLR, (b) Gaussian LPF, (c) hard thresholding (d) soft thresholding (e) reduce color (f) image sharpening (g) Wiener filtering (h) histogram equalization. Back to article page